diff --git a/src/algorithm/compression/zlib.rs b/src/algorithm/compression/zlib.rs
index f5fbded..6670e9f 100644
--- a/src/algorithm/compression/zlib.rs
+++ b/src/algorithm/compression/zlib.rs
@@ -1,57 +1,3 @@
-// pub struct Zlib<'a> {
-//     decompressor: flate2::Decompress,
-//     compressor: flate2::Compress,
-//     input: &'a [u8],
-// }
-
-// impl<'a> Zlib<'a> {
-//     pub fn new(decompressor: flate2::Decompress, input: &'a [u8]) -> Zlib<'a> {
-//         Zlib {
-//             decompressor,
-//             input,
-//         }
-//     }
-
-//     pub fn into_inner(self) -> Result<flate2::Decompress> {
-//         if self.input.is_empty() {
-//             Ok(self.decompressor)
-//         } else {
-//             Err(std::io::Error::new(
-//                 std::io::ErrorKind::InvalidData,
-//                 "leftover zlib byte data",
-//             ))
-//         }
-//     }
-
-//     pub fn read_u8(&mut self) -> std::io::Result<u8> {
-//         let mut buf = [0; 1];
-//         self.read_exact(&mut buf)?;
-//         Ok(buf[0])
-//     }
-// }
-
-// impl<'a> Read for Zlib<'a> {
-//     fn read(&mut self, output: &mut [u8]) -> std::io::Result<usize> {
-//         let in_before = self.decompressor.total_in();
-//         let out_before = self.decompressor.total_out();
-//         let result =
-//             self.decompressor
-//                 .decompress(self.input, output, flate2::FlushDecompress::None);
-//         let consumed = (self.decompressor.total_in() - in_before) as usize;
-//         let produced = (self.decompressor.total_out() - out_before) as usize;
-
-//         self.input = &self.input[consumed..];
-//         match result {
-//             Ok(flate2::Status::Ok) => Ok(produced),
-//             Ok(flate2::Status::BufError) => Ok(0),
-//             Err(error) => Err(std::io::Error::new(std::io::ErrorKind::InvalidData, error)),
-//             Ok(flate2::Status::StreamEnd) => Err(std::io::Error::new(
-//                 std::io::ErrorKind::InvalidData,
-//                 "zlib stream end",
-//             )),
-//         }
-//     }
-// }
 use flate2;
 
 use crate::SshError;